| spirillum | any of a number of aerobic spiral-shaped bacteria | en | (isim) | en |
| spirillum | any flagellated aerobic bacteria having a spirally twisted rodlike form spirally twisted elongate rodlike bacteria usually living in stagnant water | en | en |
| spirillum | One species is said to be the cause of relapsing fever | en | en |
| spirillum | A genus of common motile microörganisms (Spirobacteria) having the form of spiral- shaped filaments | en | en |
| spirillum | Any of the spiral-shaped bacteria that make up the genus Spirillum, which are aquatic except for one species that causes a type of rat-bite fever in humans. The term is used generally for any corkscrewlike species of bacteria (see spirochete). Spirilla are gram-negative (see gram stain) and move by means of tufts of flagella at each end | en | en |
